Fig. 4

Sample 1 and sample 2, the large cell nuclei marked with green circles can be easily classified as F&E cells because of their big radius. However, they are actually neuro-related cells, as indicated by the yellow fibrous structures in the color image, representing the neuro-transmission fibers. Sample 3 is often misclassified as an F&E cell, but it is a progenitor cell located on an F&E cell, as shown in the color image.